Heel flap and gusset. Though my main reason is that I enjoy the process of knitting it. Also great for those new shoes with a tight back, protects your achilles quite well
I have only done one and a half pair of socks, but I really like the shadow wrap short row heel. It fits nicely and its not too difficult to do once you get the hang of it! But it does take some work with the knitting together so you dont get holes
This is about the foot not about what i like. It is unfortunate each foot is like fingerprint. The tall foot needs deeper heel like heel flap and gusset. The shorter heel is happy with a short row heel. The fish lip heel requires a steeper foot that is also short. It is difficult to make the sock for gifts because to measure the foot of a person removes surprise portion of gifting experience.